Question:
If an alternating voltage is applied across a p-n junction diode in series with a load then
If an alternating voltage is applied across a p-n junction diode in series with a load then
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A single diode rectifier gives pulsating DC, not steady DC.
Updated On: May 14, 2026
- no voltage appears across load.
- a pulsating voltage appears across load.
- an a.c. voltage appears across load.
- a d.c. voltage appears across load which is not pulsating.
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The Correct Option is B
Solution and Explanation
Concept:
A p-n junction diode with AC supply and load acts as a rectifier. It allows current only during one half cycle, so the output across the load becomes unidirectional but varying. ip
Step 1: Understand diode action.
In one half cycle, the diode is forward biased and current flows. In the opposite half cycle, the diode is reverse biased and current does not flow. ip
Step 2: Identify output form.
The output is not pure AC and not perfectly smooth DC. It is rectified DC with ripples, that is, pulsating voltage. ip Hence, the correct answer is:
\[ \boxed{(B)\ \text{a pulsating voltage appears across load}} \]
A p-n junction diode with AC supply and load acts as a rectifier. It allows current only during one half cycle, so the output across the load becomes unidirectional but varying. ip
Step 1: Understand diode action.
In one half cycle, the diode is forward biased and current flows. In the opposite half cycle, the diode is reverse biased and current does not flow. ip
Step 2: Identify output form.
The output is not pure AC and not perfectly smooth DC. It is rectified DC with ripples, that is, pulsating voltage. ip Hence, the correct answer is:
\[ \boxed{(B)\ \text{a pulsating voltage appears across load}} \]
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